Isotropy congruence
From Encyclopedia of Mathematics
A congruence (cf. Congruence of lines) with indefinite principal surfaces.
How to Cite This Entry:
Isotropy congruence. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Isotropy_congruence&oldid=11640
Isotropy congruence. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Isotropy_congruence&oldid=11640